Patents by Inventor Philip J. Ryan

Philip J. Ryan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7929507
    Abstract: A method, an apparatus for inclusion in a wireless station, and a computer readable storage medium for operation in a wireless station. The method includes received data from at least one remote station and determining an EVM measure from samples of the received data. If the remote station(s) is/are access point(s), the station selects an access point for association according to criteria that include the measure of the EVM from the remote station.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: April 19, 2011
    Assignee: Cisco Technology, Inc.
    Inventors: David S. Goodall, Philip J. Ryan, Andrew F. Myles, Ludovico N. de Souza
  • Patent number: 7849391
    Abstract: An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: December 7, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Richard A. Keaney, John D. O'Sullivan, Brian Hart, Philip J. Ryan, Kurt A. Lumbatis, Kevin C. H. Wong
  • Patent number: 7835371
    Abstract: A method of wirelessly transmitting or receiving a packet of information, and an apparatus to wirelessly transmit or receive a packet of information. In the case of transmitting, the method includes streaming a data element, including at least some of the contents of the packet, over a network link during transmit time. In the case of receiving, the method includes streaming a data element, including at least some of the contents of the received packet, over a network link during receive time. The transmitting or receiving is by a station of a wireless network and the streaming is to or from the station from or to a network device coupled to the station by the network link.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: November 16, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Mark Krischer, Philip J. Ryan, Michael J. Webb
  • Patent number: 7683773
    Abstract: Telemetry data may be included in packet exchanges of authentication protocols. In one example, a tag, associated with shipped goods, authenticates with a local area network that is associated with a destination of the goods. An identification is received from the tag and the authentication and the identification are sent to a remote location as an indication of the goods being at the destination.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: March 23, 2010
    Assignee: G2 Microsystems Pty, Ltd.
    Inventors: David S. Goodall, Geoffrey J. Smith, Philip J. Ryan, Gordon T. Foyster
  • Patent number: 7668523
    Abstract: An apparatus, a carrier medium storing instructions to implement a method, and a method for controlling the gain of a radio receiver for receiving packets of information in a wireless network. The receiver is connected to an antenna subsystem and has receive signal path including a plurality of sections including a first section coupled to the antenna subsystem and a next section. Each section has an adjustable gain and is able to provide a measure of the signal strength at its output. The method includes waiting for a start of packet indication, providing a measure of the signal strength at the output of the first section and the next section, and adjusting the gains of the first and the next sections using the provided measured signal strengths. In one embodiment, the receive signal path includes a filter, the provided measure for the first section is before the filter, and the provided measure for the second section is after the filter.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: February 23, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Andrew R. Adams, Philip J. Ryan, Brian Hart
  • Patent number: 7548532
    Abstract: A method of wirelessly transmitting or receiving a packet of information, and an apparatus to wirelessly transmit or receive a packet of information. In the case of transmitting, the method includes streaming a data element, including at least some of the contents of the packet, over a network link during transmit time, including encrypting the data element during the streaming in real time prior to the transfer over the network link. In the case of receiving, the method includes streaming a data element, including at least some of the contents of the received packet, over a network link during receive time, including decrypting the data element during the streaming in real time after to the transfer over the network link. The transmitting or receiving is by a station of a wireless network and the streaming is to or from the station from or to a network device coupled to the station by the network link.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: June 16, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Mark Krischer, Philip J. Ryan, Michael J. Webb
  • Patent number: 7460512
    Abstract: An apparatus for inclusion and a method for operation in a station (STA) of a wireless network. The method includes received data from at least one remote station and determining a measure of the signal quality, e.g., a measure of the EVM from samples of the data received from the remote station(s). If the remote station(s) is/are access point(s), the station selects an access point for association according to criteria that include the measure of the EVM from the remote station. If the received data includes a request management message, the station responds to the request management message with a response management message that include a measure of the EVM of the received data corresponding to the request management message. Thus, the remote station receiving the response management message receives an indication of the quality of the link between the station and the remote station without the receiving remote station necessarily being EVM-capable.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: December 2, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: David S. Goodall, Philip J. Ryan, Andrew F. Myles, Ludovico N. de Souza
  • Publication number: 20080273536
    Abstract: An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field.
    Type: Application
    Filed: July 17, 2008
    Publication date: November 6, 2008
    Inventors: Richard A. Keaney, John D. O'Sullivan, Brian Hart, Philip J. Ryan, Kurt A. Lumbatis, Kevin C. H. Wong
  • Publication number: 20080266160
    Abstract: A method, an apparatus for inclusion in a wireless station, and a computer readable storage medium for operation in a wireless station. The method includes received data from at least one remote station and determining an EVM measure from samples of the received data. If the remote station(s) is/are access point(s), the station selects an access point for association according to criteria that include the measure of the EVM from the remote station.
    Type: Application
    Filed: July 17, 2008
    Publication date: October 30, 2008
    Inventors: David S. Goodall, Philip J. Ryan, Andrew F. Myles, Ludovico N. de Souza
  • Patent number: 7426249
    Abstract: A configurable Viterbi decoder to decode a coded signal for inclusion in a radio receiver for implementing the physical layer receiving function (PHY) of a wireless data network. The decoder includes a branch metric generator with an input to the coded signal, an ACS subsystem coupled to the branch metric generator, and a survivor memory unit coupled to the ACS subsystem. The decoder includes a plurality of outputs each providing a decoded version of the input signal decoded to a distinct decision depth such that the Viterbi decoder is programmable to decode the signal to one of a plurality of decision depths.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: September 16, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Richard A. Keaney, Thomas McDermott, Philip J. Ryan
  • Patent number: 7415661
    Abstract: An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: August 19, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Richard A. Keaney, John D. O'Sullivan, Brian Hart, Philip J. Ryan, Kurt A. Lumbatis, Kevin C. H. Wong
  • Patent number: 7411935
    Abstract: An apparatus in a node of a wireless network for setting the data rate for sending data to a remote node, and a method for setting the data rate. The method includes receiving a packet from the remote node, determining a measure of signal quality for the received packet; and selecting the data rate for communicating to the remote node according to at least the determined signal quality. The measure of signal quality is a measure of the EVM of the received packet. One implementation conforms to one or more variants of the IEEE 802.11 standard that uses OFDM packets.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: August 12, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Philip J. Ryan, Andrew R. Adams, Brian Hart, Jason R. Crawford, Andrew F. Myles
  • Patent number: 7359311
    Abstract: A method, apparatus, and carrier medium for determining channel state information (CSI) in an OFDM radio receiver. The receiver is for receiving packets of OFDM data as a result of OFDM data being transmitted. The method includes forming an estimate of the channels of the subcarriers for received OFDM data to provide frequency responses of the channels of the subcarriers, and forming a measure of quality (“channel state information,” “CSI”) for the channels of the subcarriers based on the relative strength of the frequency responses. The forming of the CSI does not require estimating the relative amount of noise or interference in each channel. The formed CSI is used in demodulating and decoding received OFDM data.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: April 15, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Milind D. Paranjpe, Brian Hart, David J. Pignatelli, Ender Ayanoglu, Eldad Perahia, Philip J. Ryan, Bretton Lee Douglas, Uri Parker
  • Patent number: 7315281
    Abstract: A method of determining a geographical location of an asset tracking device, includes searching, by the asset tracking device, for available location determination schemes at the geographical location, selecting one of the available location determination schemes, and determining coordinates of the geographical location using the selected location determination scheme. Some embodiments also include making a decision based, at least in part, upon the geographical location coordinates determined by using the selected location determination scheme. Some embodiments include transmitting a location message, the location message including the coordinates of the geographical location and an indication as to the selected location determination scheme.
    Type: Grant
    Filed: July 30, 2005
    Date of Patent: January 1, 2008
    Assignee: G2 Microsystems Pty. Ltd.
    Inventors: Thomas Dejanovic, John S. Gloekler, Geoffrey J. Smith, Philip J. Ryan, John O'Sullivan
  • Patent number: 7304969
    Abstract: A digital AGC system for burst operation, particularly suited for receiving packets in a wireless local area network. One embodiment includes a log detector that provides a signal strength measure, called the received signal strength indication (RSSI) over a wide dynamic range. The AGC system includes estimating the power in a received signal by averaging the log of the signal power. The Start of Packet detection avoids using the radio receiver's main analog to digital converters to preserve power.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: December 4, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: Philip J. Ryan, Andrew R. Adams, John D. O'Sullivan, Uri Parker, Brian Hart, Grzegorz B. Zyner
  • Patent number: 7212798
    Abstract: An apparatus, a carrier medium storing instructions to implement a method, and a method for controlling the gain of a radio receiver for receiving packets of information in a wireless network. The receiver is connected to an antenna subsystem and has receive signal path including a plurality of sections including a first section coupled to the antenna subsystem and a next section. Each section has an adjustable gain and is able to provide a measure of the signal strength at its output. The method includes waiting for a start of packet indication, providing a measure of the signal strength at the output of the first section and the next section, and adjusting the gains of the first and the next sections using the provided measured signal strengths. In one embodiment, the receive signal path includes a filter, the provided measure for the first section is before the filter, and the provided measure for the second section is after the filter.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: May 1, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: Andrew R. Adams, Philip J. Ryan, Brian Hart
  • Patent number: 7151759
    Abstract: A digital AGC system for burst operation, particularly suited for receiving packets in a wireless local area network. One embodiment includes a log detector that provides a signal strength measure, called the received signal strength indication (RSSI) over a wide dynamic range. The AGC system includes estimating the power in a received signal by averaging the log of the signal power. The Start of Packet detection avoids using the radio receiver's main analog to digital converters to preserve power.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: December 19, 2006
    Assignee: Cisco Systems Wireless Networking (Australia) Pty Limited
    Inventors: Philip J. Ryan, Andrew R. Adams, John D. O'Sullivan, Uri Parker, Brian Hart, Grzegorz B. Zyner
  • Patent number: 7065036
    Abstract: A radio receiver for implementing the physical layer receiving function (PHY) of a wireless data network includes a receive processing pipeline for processing samples of a received packet of data. The samples enter the receive processing pipeline at a first sample rate. A counter generates a running count indicative of the number of samples that have entered the processing pipeline. A comparison unit coupled to the counter determines from the running count if all the samples of the received packet have entered the pipeline. An output of the comparison unit indicates whether or not all samples have entered the pipeline. A clock unit coupled to the comparison unit output provides a clock signal to the pipeline, causing the processing pipeline to process the samples entering the pipeline at a first rate compatible with the first sample rate until the comparison unit output indicates that all samples have entered the pipeline.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: June 20, 2006
    Assignee: Cisco Systems Wireless Networking (Australia) Pty Limited
    Inventor: Philip J. Ryan
  • Patent number: 7062703
    Abstract: An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: June 13, 2006
    Assignee: Cisco Technology, Inc
    Inventors: Richard A. Keaney, John D. O'Sullivan, Brian Hart, Philip J. Ryan, Kurt A. Lumbatis, Kevin C. H. Wong
  • Patent number: 7046746
    Abstract: A configurable Viterbi decoder to decode a coded signal for inclusion in a radio receiver for implementing the physical layer receiving function (PHY) of a wireless data network. The decoder includes a branch metric generator with an input to the coded signal, an ACS subsystem coupled to the branch metric generator, and a survivor memory unit coupled to the ACS subsystem. The decoder includes a plurality of outputs each providing a decoded version of the input signal decoded to a distinct decision depth such that the Viterbi decoder is programmable to decode the signal to one of a plurality of decision depths.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: May 16, 2006
    Assignee: Cisco Systems Wireless Networking (Australia) Pty Limited
    Inventors: Richard A. Keaney, Thomas McDermott, Philip J. Ryan